Dimensionality effects in the physical properties of Heusler and magnetostrictive ...
Study of the magnetocaloric effect in intermetallic compounds
Magnetic properties of nanostructured powders, nanowires and thin films based on F...
| Grant number: | 18/19096-1 |
| Support type: | Scholarships in Brazil - Post-Doctorate |
| Effective date (Start): | March 01, 2019 |
| Effective date (End): | February 28, 2021 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Condensed Matter Physics |
| Principal Investigator: | Fanny Béron |
| Grantee: | Prabhakaran Thandapani |
| Home Institution: | Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil |
| Associated research grant: | 17/10581-1 - Emergent phenomena in reduced dimension systems, AP.TEM |
Abstract Recently the research interest in finding a suitable alternative to the existing conventional technology and reducing the consumption of fossil fuel increases. Conventional vapor compression cooling system uses of CFC and HCFC refrigerants have introduced serious impacts on the environment. The magnetic refrigeration (MR) is a promising alternative to the conventional cooling systems and has attracted a large number of researchers due to its high energy efficiency and environmentally friendly approach. The nanostructured materials are special for MR as they have a higher magnetocaloric effect over a distribution of temperature and better cooling efficiency compared to the bulk. One-dimensional nanowires are attracting great interest due to their multifunctional properties. The dimensionality effect makes them potential candidate in various functional devices such as optical, biomedical, and electrical devices. Based on previous experiences of fellow candidate and sponsoring researcher, the ideas of dimensionality are extended for achieving highly efficient magnetic refrigerants. The present project is proposed to focus on the dimensionality effects on the bulk intermetallic single crystals for green MR applications.The methodology involved in this project is divided as follows: 1. Fabricate the MnAs1-xPx (0.01 d x d 0.1) and Mn1-xCuxCoGe (0.01 d x d 0.1) intermetallic bulk and nanowire crystals using metallic-flux nanonucleation technique. 2. Investigate the fundamental properties such as crystalline structure, morphology, elemental composition, magnetic properties at different temperature and magnetic fields, specific heat capacity and electrical resistivity measurements and 3. Compare the properties of the materials and propose the best magnetic refrigerant for the cooling applications. | |